2000ApJS..127..125G

Query : 2000ApJS..127..125G

2000ApJS..127..125G - Astrophys. J., Suppl. Ser., 127, 125-140 (2000/March-0)

H2 and brγ narrowband imaging of bipolar planetary nebulae.

GUERRERO M.A., VILLAVER E., MANCHADO A., GARCIA-LARIO P. and PRADA F.

Abstract (from CDS):

We present near-IR narrowband continuum-subtracted images in the H2 2.122 µm, and Brγ 2.166 µm emission lines for a sample of 15 bipolar planetary nebulae (PNe). H2 emission was definitely detected for most of the objects in this sample (13 of 15). The very high H2 detection rate supports the idea that bipolar PNe have important reservoirs of molecular material and offer suitable physical conditions for the excitation of H2. The strength of the H2 emission and the H2/Brγ flux ratio are found to correlate with the morphology of the bipolar PNe observed. Bipolar PNe with broad and bright rings exhibit stronger H2 emission than bipolar PNe with narrow twists. High-quality (subarcsec) [N II] and Hα optical images have been used to compare the distribution of the ionized and molecular material. The H2 emission lies just outside the optical [N II] emission zone.

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Journal keyword(s): Infrared: ISM: Lines and Bands - ISM: Lines and Bands - ISM: Molecules - ISM: Planetary Nebulae: General

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PN BV 1 PN 00 20 00.450 +62 59 03.16           ~ 56 0
2 TYC 351-60-1 ** 15 38 33.353376 +00 14 19.11120 12.757 12.464 11.720 11.558 10.850 ~ 18 0
3 PN M 1-57 PN 18 40 20.2561639992 -10 39 47.216941560           ~ 98 0
4 PN PC 20 PN 18 43 03.474 -00 16 37.73         16.80 ~ 26 0
5 PN M 1-59 PN 18 43 20.191200 -09 04 49.02708       13.885 13.700 ~ 102 1
6 PN M 2-46 PN 18 46 34.6173214361 -08 28 01.989963760         15.183 ~ 76 0
7 PN M 4-12 PN 19 13 05.4493583551 +15 46 39.915114808   16.327 15.095 15.678   ~ 100 0
8 PN M 4-14 PN 19 21 00.718 +07 36 52.37           ~ 56 0
9 PN K 3-34 PN 19 24 02.735 +25 18 47.56           ~ 21 0
10 Hen 2-437 PN 19 32 57.6040534728 +26 52 43.087922580           ~ 98 1
11 PN M 1-75 PN 20 04 44.21070 +31 27 26.6673           ~ 102 2
12 PN M 4-17 PN 20 09 01.927 +43 43 43.54           ~ 39 0
13 NGC 6881 PN 20 10 52.45 +37 24 42.4           ~ 213 0
14 PN K 3-58 PN 20 21 58.279 +29 59 21.08           ~ 34 0
15 PN K 4-55 PN 20 45 10.021 +44 39 14.58   16.0 16.5     ~ 47 0
16 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1
17 PN M 2-52 PN 22 20 30.42480 +57 36 19.6450           ~ 60 1

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